Could Rihanna and Katy Perry be the next Paris Hilton and Nicole Richie? Maybe. It was just weeks ago that R & B queen Rihanna was throwing a bachelorette party for BFF Katy Perry. And while they might be great friends on the surface, it's unlikely Perry will be kissing this girl anytime soon, especially when she hears what Rihanna's been saying about her behind her back. While promoting her new album Loud, Rihanna took the opportunity to slam the fellow singer and in the ultimate insult deemed her music "generic." Rihanna told BBC Radio 1, "Every song was tailored to me. I wanted songs that were all Rihanna, songs that nobody else could do. I didn't want the generic pop record that Ke$sha or Lady Gaga or Katy Perry would do." Generic or not, Rihanna obviously is overlooking the fact that they are hits. It looks like somebody is going to be shopping for a new maid of honor before she ties the knot with Russell Brand. With friends like Rihanna, who needs enemies???